The three principal organs of seed plants are roots, stems, and leaves. Roots: absorb water and dissolved nutrients. anchor plants in the ground.
Carbohydrates, lipids, and nucleic acids
hope this helps :)
I would go with c because its tells you right in there that the ecosystem help who lives around that area.
Answer:
Oxygen
Explanation
Cellular respiration means taking Oxygen and using it to "breathe" and also be used in many other processes.
